Hand-reamer.



E. G. MUSSER & T. DILGER.

HAND REAMER.

APPLICATION FILED JUNE 22, 1914.

Withesses Patented Jan. 26, 1915.

ZZZLJIZLfZfi ND Inventors Attorneys nrrnn snares rngrnnr orricn.

ERNEST C. MUSSER AND THEODORE DILGER, OF BLUEFIELD, WEST VIRGINIA.

HAND-REAMER.

insects.

Application filed June 22, 1914.

1/ h (M 20710112. it may concern Be it known that we, ERNEST C. Mnssnnand THEODORE DILGER, citizens of the United States, residing atBluefield, in the county of Mercer, State of West Virginia, haveinvented a new and useful Hand- Reamer, of which the following is aspecification.

This invention relates to a hand reamer and more particularly to onewhich is especially adapted to ream watch bezels.

The invention aims to provide a reamer which is rotated by hand and maybe easily and quickly adjusted to thus ream a Watch bezel to the desiredsize for the reception of a crystal.

A further object is to provide a hand reamer with cutters which may beadjusted during the manual rotation of the reamer.

TNith the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, can be made within thescope of what is claimed, without departing from the spirit of theinvention.

In the drawings accompanying this specification and forming a partthereof, the preferred embodiment of our invention has been illustrated,in which Figure 1 is a view in elevation of our improved hand reamer,illustrating the same in the act of reaming a watch bezel, the latterbeing fragmentally depicted. Fig. 2 is a view in longitudinal section ofthe reamer. Fig. 3 is a bottom plan view thereof. Fig. 4% is a crosssectional view taken on the line 4-4 of Fig. 2. Fig. 5 is a detail viewin perspective of one of the movable cutters.

Referring to the drawings in which similar reference numerals designatecorresponding parts throughout the several views, the handle 7 isenlarged at its lower extremity to form the head 8.

A central bore 9 extends for a limited distance within the head andcommunicating with which are the three symmetrically arranged andradially extending slots 10.

The slots 10 are adapted to receive the cutters 11 therein and the bore9 is adapted to receive the expanding member 15 therein. The bore 9extends a slight distance between Specification of Letters Patent.

Patented Jan. 26, 1915.

Serial No. 846,675.

the lower level of the slots 10 and communirates with the threaded bore18 which extends entirely through the handle or shank 7. The expandingmember includes a conical lower portion 14 and an upper cylindricalportion 15, the latter being of such size as to slide within and beguided by the side walls of the bore 9.

A thumb screw 16 threadedly engagesthe bore 13 and is provided with thelower restricted portion 17 which contacts with the expanding member andis adapted to move the same in a forced manner. The upper extremity ofthe thumb screw is provided with the knurled head 18 by means of whichthe cutters may be adjusted during the manual rotation of the reamer.The three cutters are exactly similar, for which reason, only one willbe treated in detail, which as illustrated in Fig. 5, comprises the bodyportion 19 and the lower and more restricted portion 20. The differencein size between the portions 19 and 20 defines two shoulders or ledges21 by means of which the cutters are held within the slots 10.

Three segmental plates 23 are rigidly se cured to the cutter head by thescrews 24 or allied means and which plates are spaced a distance apartso as to define three slots 25 which lie directly above but are morelimited in width than the slots 10. The slots 25 are of such size as toslidably receive the portion 20 of the cutters therein but toorestricted to allow the portion 19 of the cutters to pass therethrough.This provides that when the cutters are mounted within the slots and theplates 23 secured to the cutter head, the cutters may move freelylongitudinally in the slots but are prevented from moving transverselythereof. The cutters are each provided with the cutting blades 26rigidly secured thereto, which cutting blades include the serrated orcutting edges 27 The adjacent central portions of the segmental plates23 are rounded as at 28, which allows portions of the helical expandingmember to pass therethrough but prevents the same from becoming entirelydetached from the head. Each of the cutters is provided with the groove29 extending along the upper surface, which groove is adapted to receivethe compression spring 30 therein, which spring contacts with the rearwall 31 of the groove.

A band or ring 32 extends around the head 8 and fits within the annulargroove or ledge 33 so that the outer surfaces of the ring and head willlie substantially in the same plane to thus define a continuous andunbroken surface. The ring 32 includes three upstanding ears 3a whichextend in front of the slot as illustrated in Fig. 2 and receive thecompression spring thereagainst. This confines the compression springWithin the groove 29 and a similar groove 35 which is formed along thebottom Wall of the slots 10. The inner edge of each cutter provided withthe beveled face 22 which receives the conical surface of the expandingmember thereagainst and provides for the forced adjustment of thecutters. lhe surface 36 of the handle or shank 7 is serrated or knurledso as to provide a suitable grip, by means of which the reamer may bemanually rotated. The head ofthe thumb screw extends upwardly Within thepalm of the hand and this provides for either the expansion orretraction of the various cutters, while the rcamer is being rotated.The reamer thus formed is particularly adapted for reaming Watch bezels.It

s has been found in practice that the Watch crystals vary insize,necessitating the reaming of the Watch bezels. This can be quicklyand conveniently accomplished With the reamer' as herein described.

Having thus fully described our invention,

' What We claim is A manually operable reamer for Watch bezclscomprising a head, a handle proecting therefrom, a bore extendingthrough 35 head and handle and enlarged for a limited distance Withinsaid head, an expanding member positioned in the enlarged portion ofsaid bore, segmental plates secured to the said head and positioned adis- 40 tance apart, defining slots, said head provided with slotsregistering with and slightly larger than the slots defined by saidplates, cutters slidably mounted Within and limited to rectilinearmotion by said slots, said head and cutters provided with registeringgrooves, springs positioned Within said grooves adapted to retract saidcutters, and a ring frictionally engaging the head and provided withdownwardly extending cars Copies of this patent may be obtained for fivecents each, by addressing the Commissioner of Patents,

Washington, D. G.

